requirejs.config({
  baseUrl: '../../dist',
  paths: {
    jquery: '../examples/image-upload/jquery'
  }
});

require(['webuploader.flashonly'], function (WebUploader) {
  // 当domReady的时候开始初始化
  $(function () {
    var $wrap = $('#uploader'),

      // 图片容器
      $queue = $('<ul class="filelist"></ul>')
        .appendTo($wrap.find('.queueList')),

      // 状态栏，包括进度和控制按钮
      $statusBar = $wrap.find('.statusBar'),

      // 文件总体选择信息。
      $info = $statusBar.find('.info'),

      // 上传按钮
      $upload = $wrap.find('.uploadBtn'),

      // 没选择文件之前的内容。
      $placeHolder = $wrap.find('.placeholder'),

      $progress = $statusBar.find('.progress').hide(),

      // 添加的文件数量
      fileCount = 0,

      // 添加的文件总大小
      fileSize = 0,

      // 优化retina, 在retina下这个值是2
      ratio = window.devicePixelRatio || 1,

      // 缩略图大小
      thumbnailWidth = 110 * ratio,
      thumbnailHeight = 110 * ratio,

      // 可能有pedding, ready, uploading, confirm, done.
      state = 'pedding',

      // 所有文件的进度信息，key为file id
      percentages = {},

      supportTransition = (function () {
        var s = document.createElement('p').style,
          r = 'transition' in s ||
            'WebkitTransition' in s ||
            'MozTransition' in s ||
            'msTransition' in s ||
            'OTransition' in s;
        s = null;
        return r;
      })(),

      // WebUploader实例
      uploader;

    // 实例化
    uploader = WebUploader.create({
      pick: {
        id: '#filePicker',
        label: '点击选择图片'
      },
      dnd: '#dndArea',
      paste: '#uploader',
      swf: '../../dist/Uploader.swf',
      chunked: true,
      // runtimeOrder: 'flash',
      sendAsBinary: true,
      server: '../../server/fileupload.php',
      // server: 'http://liaoxuezhi.fe.baidu.com/webupload/fileupload.php',
      // server: 'http://www.2betop.net/fileupload.php',
      fileNumLimit: 300,
      fileSizeLimit: 200 * 1024 * 1024,    // 200 M
      fileSingleSizeLimit: 50 * 1024 * 1024    // 50 M
    });

    // 添加“添加文件”的按钮，
    uploader.addButton({
      id: '#filePicker2',
      label: '继续添加'
    });

    // 当有文件添加进来时执行，负责view的创建
    function addFile(file) {
      var $li = $('<li id="' + file.id + '">' +
          '<p class="title">' + file.name + '</p>' +
          '<p class="imgWrap"></p>' +
          '<p class="progress"><span></span></p>' +
          '</li>'),

        $btns = $('<div class="file-panel">' +
          '<span class="cancel">删除</span>' +
          '<span class="rotateRight">向右旋转</span>' +
          '<span class="rotateLeft">向左旋转</span></div>').appendTo($li),
        $prgress = $li.find('p.progress span'),
        $wrap = $li.find('p.imgWrap'),
        $info = $('<p class="error"></p>'),

        showError = function (code) {
          switch (code) {
            case 'exceed_size':
              text = '文件大小超出';
              break;

            case 'interrupt':
              text = '上传暂停';
              break;

            default:
              text = '上传失败，请重试';
              break;
          }

          $info.text(text).appendTo($li);
        };

      if (file.getStatus() === 'invalid') {
        showError(file.statusText);
      } else {
        // @todo lazyload
        $wrap.text('预览中');
        uploader.makeThumb(file, function (error, src) {
          if (error) {
            $wrap.text('不能预览');
            return;
          }

          var img = $('<img src="' + src + '">');
          $wrap.empty().append(img);
        }, thumbnailWidth, thumbnailHeight);

        percentages[file.id] = [file.size, 0];
        file.rotation = 0;
      }

      file.on('statuschange', function (cur, prev) {
        if (prev === 'progress') {
          $prgress.hide().width(0);
        } else if (prev === 'queued') {
          $li.off('mouseenter mouseleave');
          $btns.remove();
        }

        // 成功
        if (cur === 'error' || cur === 'invalid') {
          console.log(file.statusText);
          showError(file.statusText);
          percentages[file.id][1] = 1;
        } else if (cur === 'interrupt') {
          showError('interrupt');
        } else if (cur === 'queued') {
          percentages[file.id][1] = 0;
        } else if (cur === 'progress') {
          $info.remove();
          $prgress.css('display', 'block');
        } else if (cur === 'complete') {
          $li.append('<span class="success"></span>');
        }

        $li.removeClass('state-' + prev).addClass('state-' + cur);
      });

      $li.on('mouseenter', function () {
        $btns.stop().animate({height: 30});
      });

      $li.on('mouseleave', function () {
        $btns.stop().animate({height: 0});
      });

      $btns.on('click', 'span', function () {
        var index = $(this).index(),
          deg;

        switch (index) {
          case 0:
            uploader.removeFile(file);
            return;

          case 1:
            file.rotation += 90;
            break;

          case 2:
            file.rotation -= 90;
            break;
        }

        if (supportTransition) {
          deg = 'rotate(' + file.rotation + 'deg)';
          $wrap.css({
            '-webkit-transform': deg,
            '-mos-transform': deg,
            '-o-transform': deg,
            'transform': deg
          });
        } else {
          $wrap.css('filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation=' + (~~((file.rotation / 90) % 4 + 4) % 4) + ')');
          // use jquery animate to rotation
          // $({
          //     rotation: rotation
          // }).animate({
          //     rotation: file.rotation
          // }, {
          //     easing: 'linear',
          //     step: function( now ) {
          //         now = now * Math.PI / 180;

          //         var cos = Math.cos( now ),
          //             sin = Math.sin( now );

          //         $wrap.css( 'filter', "progid:DXImageTransform.Microsoft.Matrix(M11=" + cos + ",M12=" + (-sin) + ",M21=" + sin + ",M22=" + cos + ",SizingMethod='auto expand')");
          //     }
          // });
        }


      });

      $li.appendTo($queue);
    }

    // 负责view的销毁
    function removeFile(file) {
      var $li = $('#' + file.id);

      delete percentages[file.id];
      updateTotalProgress();
      $li.off().find('.file-panel').off().end().remove();
    }

    function updateTotalProgress() {
      var loaded = 0,
        total = 0,
        spans = $progress.children(),
        percent;

      $.each(percentages, function (k, v) {
        total += v[0];
        loaded += v[0] * v[1];
      });

      percent = total ? loaded / total : 0;

      spans.eq(0).text(Math.round(percent * 100) + '%');
      spans.eq(1).css('width', Math.round(percent * 100) + '%');
      updateStatus();
    }

    function updateStatus() {
      var text = '', stats;

      if (state === 'ready') {
        text = '选中' + fileCount + '张图片，共' +
          WebUploader.formatSize(fileSize) + '。';
      } else if (state === 'confirm') {
        stats = uploader.getStats();
        if (stats.uploadFailNum) {
          text = '已成功上传' + stats.successNum + '张照片至XX相册，' +
            stats.uploadFailNum + '张照片上传失败，<a class="retry" href="#">重新上传</a>失败图片或<a class="ignore" href="#">忽略</a>'
        }

      } else {
        stats = uploader.getStats();
        text = '共' + fileCount + '张（' +
          WebUploader.formatSize(fileSize) +
          '），已上传' + stats.successNum + '张';

        if (stats.uploadFailNum) {
          text += '，失败' + stats.uploadFailNum + '张';
        }
      }

      $info.html(text);
    }

    function setState(val) {
      var file, stats;

      if (val === state) {
        return;
      }

      $upload.removeClass('state-' + state);
      $upload.addClass('state-' + val);
      state = val;

      switch (state) {
        case 'pedding':
          $placeHolder.removeClass('element-invisible');
          $queue.hide();
          $statusBar.addClass('element-invisible');
          uploader.refresh();
          break;

        case 'ready':
          $placeHolder.addClass('element-invisible');
          $('#filePicker2').removeClass('element-invisible');
          $queue.show();
          $statusBar.removeClass('element-invisible');
          uploader.refresh();
          break;

        case 'uploading':
          $('#filePicker2').addClass('element-invisible');
          $progress.show();
          $upload.text('暂停上传');
          break;

        case 'paused':
          $progress.show();
          $upload.text('继续上传');
          break;

        case 'confirm':
          $progress.hide();
          $upload.text('开始上传').addClass('disabled');

          stats = uploader.getStats();
          if (stats.successNum && !stats.uploadFailNum) {
            setState('finish');
            return;
          }
          break;
        case 'finish':
          stats = uploader.getStats();
          if (stats.successNum) {
            alert('上传成功');
          } else {
            // 没有成功的图片，重设
            state = 'done';
            location.reload();
          }
          break;
      }

      updateStatus();
    }

    uploader.onUploadProgress = function (file, percentage) {
      var $li = $('#' + file.id),
        $percent = $li.find('.progress span');

      $percent.css('width', percentage * 100 + '%');
      percentages[file.id][1] = percentage;
      updateTotalProgress();
    };

    uploader.onFileQueued = function (file) {
      fileCount++;
      fileSize += file.size;

      if (fileCount === 1) {
        $placeHolder.addClass('element-invisible');
        $statusBar.show();
      }

      addFile(file);
      setState('ready');
      updateTotalProgress();
    };

    uploader.onFileDequeued = function (file) {
      fileCount--;
      fileSize -= file.size;

      if (!fileCount) {
        setState('pedding');
      }

      removeFile(file);
      updateTotalProgress();

    };

    uploader.on('all', function (type) {
      var stats;
      switch (type) {
        case 'uploadFinished':
          setState('confirm');
          break;

        case 'startUpload':
          setState('uploading');
          break;

        case 'stopUpload':
          setState('paused');
          break;

      }
    });

    uploader.onError = function (code) {
      alert('Eroor: ' + code);
    };

    $upload.on('click', function () {
      if ($(this).hasClass('disabled')) {
        return false;
      }

      if (state === 'ready') {
        uploader.upload();
      } else if (state === 'paused') {
        uploader.upload();
      } else if (state === 'uploading') {
        uploader.stop();
      }
    });

    $info.on('click', '.retry', function () {
      uploader.retry();
    });

    $info.on('click', '.ignore', function () {
      alert('todo');
    });

    $upload.addClass('state-' + state);
    updateTotalProgress();
  });
});